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在非线性阶段,剪力墙构件由于其截面高度比较大,受力极为复杂,仍采用平截面假定将会造成较大的误差。考虑截面剪切变形的修正基于力插值纤维单元(MFBFE),其截面不再是平截面,而是曲面,在剪力墙构件的非线性地震反应分析有较高的精度。基于MFBFE单元对汶川地震中破坏严重的都江堰市电信大楼进行逐步增量时程分析(IDA)。分析结果显示底层和9层是薄弱层,而底层由于各指标基本都为最大值,因此将首先出现破坏,这与震害调查结果基本相符。验证了MFBFE单元在实际结构分析中的合理性和可靠性,为高层建筑结构地震灾变行为研究提供参考。
In the non-linear phase, the shear wall components due to its relatively high cross-section, the force is extremely complex, still using the cross-section assumption will cause greater errors. Based on MFBFE, the cross section is no longer a flat section, but a curved surface. The nonlinear seismic response analysis of shear wall components has high precision. Based on the MFBFE unit, the Dujiangyan City telecom complex underwent a incremental incremental time history analysis (IDA) for the Wenchuan earthquake. The analysis shows that the bottom layer and the ninth layer are weak layers, while the bottom layer is basically the maximum for each index, so the damage will occur first, which is basically consistent with the earthquake damage survey results. The rationality and reliability of MFBFE unit in actual structural analysis are verified, which provides reference for the research on seismic disaster behavior of high-rise building structure.